Multilayer helical wave filter for medical therapeutic or diagnostic applications
First Claim
1. An implantable lead having a length extending to and meeting with a distal lead end and a proximal lead end that is configured to be electrically connectable to an active medical device, the lead comprising a first multilayer helical wave filter in series with the lead somewhere along the length thereof, the first multilayer helical wave filter formed from an electrical conductor and comprising:
- a) a first helically wound segment having at least one first planar or round surface, a first end and a second end, the first helically wound segment forming a first inductive component;
b) a first return segment comprising a first return segment first end connected to the second end of the first helically wound segment and extending to a first return segment second end connected to a first end of the second helically wound segment;
c) a second helically wound segment having at least one second planar or round surface and comprising the first end connected to the second end of the first return segment and extending to a second end adjacent to the second end of the first helically wound segment and the first return segment first end, the second helically wound segment forming a second inductive component, wherein a portion of the first return segment residing in an axial relationship with respect to a longitudinal extent of the winds of the first and second helically wound segments resides entirely inside or outside both of them; and
d) a first dielectric material disposed between the first and second planar or round surfaces facing each other, thereby forming a first capacitance between adjacent coils of the first and second helically wound segments;
e) wherein the wave filter has a Q with a 3 db bandwidth that is at least 10 kHz.
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Accused Products
Abstract
A multilayer helical wave filter having a primary resonance at a selected RF diagnostic or therapeutic frequency or frequency range, includes an elongated conductor forming at least a portion of an implantable medical lead. The elongated conductor includes a first helically wound segment having at least one planar surface, a first end and a second end, which forms a first inductive component, and a second helically wound segment having at least one planar surface, a first end and a second end, which forms a second inductive element. The first and second helically wound segments are wound in the same longitudinal direction and share a common longitudinal axis. Planar surfaces of the helically wound segments face one another, and a dielectric material is disposed between the facing planar surfaces of the helically wound segments and between adjacent coils of the helically wound segments, thereby forming a capacitance.
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Citations
76 Claims
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1. An implantable lead having a length extending to and meeting with a distal lead end and a proximal lead end that is configured to be electrically connectable to an active medical device, the lead comprising a first multilayer helical wave filter in series with the lead somewhere along the length thereof, the first multilayer helical wave filter formed from an electrical conductor and comprising:
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a) a first helically wound segment having at least one first planar or round surface, a first end and a second end, the first helically wound segment forming a first inductive component; b) a first return segment comprising a first return segment first end connected to the second end of the first helically wound segment and extending to a first return segment second end connected to a first end of the second helically wound segment; c) a second helically wound segment having at least one second planar or round surface and comprising the first end connected to the second end of the first return segment and extending to a second end adjacent to the second end of the first helically wound segment and the first return segment first end, the second helically wound segment forming a second inductive component, wherein a portion of the first return segment residing in an axial relationship with respect to a longitudinal extent of the winds of the first and second helically wound segments resides entirely inside or outside both of them; and d) a first dielectric material disposed between the first and second planar or round surfaces facing each other, thereby forming a first capacitance between adjacent coils of the first and second helically wound segments; e) wherein the wave filter has a Q with a 3 db bandwidth that is at least 10 kHz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A multilayer helical wave filter that is configured to be connectable in series with an implantable lead of an active medical device, the wave filter comprising first and second helically wound segments wound in the same longitudinal direction and sharing a common longitudinal axis, the multilayer helical wave filter formed from an electrical conductor and comprising:
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a) the first helically wound segment having at least one first planar or round surface, a first end and a second end, the first helically wound segment forming a first inductive component; b) a first return segment comprising a first return segment first end connected to the second end of the first helically wound segment and extending to a first return segment second end connected to a first end of the second helically wound segment; c) the second helically wound segment having at least one second planar or round surface and comprising the first end connected to the second end of the first return segment and extending to a second end adjacent to the second end of the first helically wound segment and the first return segment first end, the second helically wound segment forming a second inductive component, wherein a portion of the first return segment residing in an axial relationship with respect to a longitudinal extent of the winds of the first and second helically wound segments resides entirely inside or outside both of them; and d) a first dielectric material disposed between the first and second planar or round surfaces facing each other, thereby forming a first capacitance between adjacent coils of the first and second helically wound segments; e) wherein the wave filter has a Q with a 3 dB bandwidth that is at least 10 kHz. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A multilayer helical wave filter that is configured to be connectable in series with an implantable lead of an active medical device, the wave filter formed from an electrical conductor and comprising:
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a) an outer helically wound segment having at least one outer planar outer surface, a first outer end and a second outer end, the outer helically wound segment forming an outer inductive component; b) an inner helically wound segment having at least one inner planar inner surface, a first inner end and a second inner end, the inner helically wound segment forming an inner inductive component, the inner and outer helically wound segments being wound in the same longitudinal direction and sharing a common longitudinal axis, wherein the at least one outer planar surface of the outer helically wound segment faces the at least one inner planar surface of the inner helically wound segment; and c) a return connecting segment connecting the second end of the outer helically wound segment to the first end of the inner helically wound segment, wherein the return connecting segment provides that current paths in the outer and inner helically wound segments will be in the same direction; and d) a first dielectric material disposed between the facing inner and outer planar surfaces and between adjacent coils of the outer and inner helically wound segments, thereby forming a first capacitance, e) wherein from the first inner end to the second inner end, the inner helically wound segment resides completely inside the outer helically wound segment. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. An implantable lead having a length extending to and meeting with a distal lead end and a proximal lead end that is configured to be electrically connectable to an active medical device, the lead comprising a first multilayer helical wave filter in series with the lead somewhere along the length thereof, the first multilayer helical wave filter formed from an electrical conductor and comprising:
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a) a first helically wound segment having at least one first planar or round surface, a first end and a second end, the first helically wound segment forming a first inductive component; b) a first return segment comprising a first return segment first end connected to the second end of the first helically wound segment and extending to a first return segment second end connected to a first end of the second helically wound segment; c) a second helically wound segment having at least one second planar or round surface and comprising the first end connected to the second end of the first return segment and extending to a second end adjacent to the second end of the first helically wound segment and the first return segment first end, the second helically wound segment forming a second inductive component, wherein a portion of the first return segment residing in an axial relationship with respect to a longitudinal extent of the winds of the first and second helically wound segments resides entirely inside or outside both of them; and d) a first dielectric material disposed between the first and second planar or round surfaces facing each other, thereby forming a first capacitance between adjacent coils of the first and second helically wound segments; e) wherein the Q of the wave filter has a 10 dB bandwidth that is at least 100 kHz. - View Dependent Claims (74)
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75. A multilayer helical wave filter that is configured to be connectable in series with an implantable lead of an active medical device, the wave filter comprising first and second helically wound segments wound in the same longitudinal direction and sharing a common longitudinal axis, the multilayer helical wave filter formed from an electrical conductor and comprising:
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a) the first helically wound segment having at least one first planar or round surface, a first end and a second end, the first helically wound segment forming a first inductive component; b) a first return segment comprising a first return segment first end connected to the second end of the first helically wound segment and extending to a first return segment second end connected to a first end of the second helically wound segment; c) the second helically wound segment having at least one second planar or round surface and comprising the first end connected to the second end of the first return segment and extending to a second end adjacent to the second end of the first helically wound segment and the first return segment first end, the second helically wound segment forming a second inductive component, wherein a portion of the first return segment residing in an axial relationship with respect to a longitudinal extent of the winds of the first and second helically wound segments resides entirely inside or outside both of them between adjacent coils of the first and second helically wound segments; and d) a first dielectric material disposed between the first and second planar or round surfaces facing each other, thereby forming a first capacitance between the first and second helically wound segments; e) wherein the wave filter has a Q with a 10 dB bandwidth that is at least 100 kHz. - View Dependent Claims (76)
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Specification